Rockport Women's Janae Zip Up Boot 100% Leather Rubber sole Shaft measures approximately 16.5" from arch Heel measures approximately 3.75" Platform measures approximately 0.75" Boot opening measures approximately 15" around Full Grain leather and suede are durable, easy to clean, and extend product life Polyurethane midsole with added thickness in arch area for mid foot support Adidas adiPrene footbed. Highly shock absorbent heel cushioning and resilient forefoot cushioning to added comfort Nanoglide lining helps reduce friction and increase abrasion resistance Boot Shaft Height 15". Shaft Circumference 6.5"